Djenné-Djenno is an ancient city located in Mali, West Africa. It is one of the oldest urban settlements in sub-Saharan Africa, with evidence of continuous habitation dating back to around 250 B.C. The site is known for its impressive mud-brick architecture and its role as a significant trading center in the region. The archaeological site of Djenné-Djenno was designated a UNESCO World Heritage Site in 1988. Excavations have revealed a wealth of artifacts, including pottery, tools, and evidence of early agriculture, highlighting the city's importance in the history of African civilization.